Is there indication to the model size resulting from size of starting paper?

No

Are the models "Pure" origami (From a single square - no cuts)?

Varies

Overall Impression

This is a book of clever origami. Nothing super complex, but rather clean, nice and effective designs.

Chapter 1 is about Kasahara's experiments with expressive origami - using half-opened folds to only suggest a figure - without getting into much details. Some of these attempts are very good, while others are just too abstract for me.

Chapter 2 showcases the work of Ichiro Kinoshita, which is very different from the first chapter. His work is more "logical".

Chapter 3 is a collection of masterpieces from around the world. There are some nice gems in here.

Chapter 4 features some national costumes, and a symbol of international origami.